Question

What annual rate of interest is required to double an investment in 3 years?

Answer 1

i tried solving this but got .23 instead of 26%

Answer 2

I know at 7% interest an investment will double in 10 years, but this doesn't help you.

let me see what I can find

is your problem simple interest?

Answer 3

I think so, yes A = Pe^(r)(t)